PORCELLANA. 
CANCER, Pennant. 
PORCELLANA, Lamarck, Leach. 
Antennae externa} extus oculos insert®. 
Antennae internee parvte, subtus frontem obtectse. 
Pedum par anticum ineequale, plus minusve complanatum, brachio brevissirno j paria 2, 3, et 4, 
ambulatoria, rnonodactyla ; par. 5, minutum, didactyle. 
Testa suborbicularis, depressa. 
Oculis minutis. 
Abdomen maximum. 
External antennse inserted outside the eyes. Internal antennae small, bidden beneath the 
fore-head. First pair of feet very large, unequal, more or less flattened, with very short arm ; 
second, third and fourth pairs ambulatory, terminating in a single finger ; fifth pair very small, 
didactyle ; eyes very small. Abdomen very large. 
* 
PORCELLANA LONGICORNIS. 
Tab. XXVII. Fig. 4—7. 
P. testa suborbiculari, fronte trilobata, loba media profunde unisulcata ; manibus insequalibus, 
elongatis, angustis, extus convexis. 
Cancer longicornis, Pennant , Brit. Zool. IV. 
Herbst, II. t. XLVIII. 
Pisidia et Porcellana Linnseana. Leacli , Diet. Sci. Nat. XVIII. 
Porcellana Leachii. Gray (Postea.) 
Fig. 4, Porcellana longicornis. 5, manus. 6, 7, pedes quartum et quintum. 
The colour of this species is generally pale red, with deeper markings. The characters of the 
hands, wrists and arms, distinguish it very decidedly from P. platycheles. It is common on the 
British coasts, being dredged in the oyster nets very abundantly in some localities. 
